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In order to expand the oxygenation range of fish ponds, improve oxygenous efficiency, ameliorate the water environment and save energy, the solar-powered walking intelligence robot was developed. The robot can walk intelligently and stir the upper and lower layers of water for oxygenation, which was suitable for 2666~5333m2 of fish ponds for auxiliary oxygenation. The robot was developed based on HF-LPB100 ultra low power embedded WiFi module exchanges data with the whole system, the solar panels provided electrical energy, besides, ultrasonic distance measurement module was used to avoid obstacles, the ultrasonic depth finder prevented the robot stranding, and there were two modes designed for the robot: automatic mode and manual mode. In the manual mode, the moving direction of robot was decided by remote control from the user for oxygenation. In the automatic mode, Z-type finite state mode was chosen in the path planning, which was based on ant colony algorithm. STM8L051F3P6 was used as core to control the electric motors, and PWM generated a square wave that decided L9110’s level to control the differential speed of double motors. The results showed that the path of the robot can reach more than 23.17% of the area, and the oxygen increasing range was 15.4% greater than that of the traditional aerator, and the oxygenation capacity was 1.69kg/h.